Being professionally involved in radio engineering, Electro Magnetic Compatability and international standards for radio, I fully agree with rolling circle. I think I noticed that SAS don't allow them either.
As an SLF, the only electronics I like to see pax use in flight are pacemakers and hearing aids. the next generation of pacemakers that can transmit the stored data will be interesting from this viewpoint, although the transmitters won't be capanle of being operated without special equipment